Safety-burner.



J. w. BEARING.

SAFETY BURNER.

APPLICATION mum JUNE 1a, 1908. r

m 4 F m. a m

P y w 1 i To all whom it may concern: I Be, itknown that I, JOSEPH W. DEARING,

" UNITED-STATES PATENT OFFICE.

JOSEPH, w. BEARING,

E IiOS ANGELESyGALIFORNIA, ASSIGNOR OF ONE-HALF TO W. S.

BULLIS, OF LOS ANGELES, CALIFORNIA.

SAFETY-BURNER.

Specification of lletters Patent.

Patented Apr. 26, 1910.

Application filed June 16, 1908. Serial No. 438,822.

a. citizen of the United States, residingv at Los Angeles, in the county of Los Angeles and Stateof California, have invented a new and useful Safety-Burner, of which 'the following is a specification.

This invention relates to burners for burning gas or liquid,-and the object of the 10 invention is to provide means for automatically closing the valve andshuttlng off-the fuel should. the flame become accidentally extinguishedg thermostat shown and described in a pre-' vious application of mine filed May 22, 1908, Serial, #434414, which thermostat, in

r thepresent case, when cool,- unlocks the automatic closing mechanism so that the valve will be closed-thereby, and another object of the invention is to provide means forautomatically retarding "the closing movement of the valveso that in lighting the burner when the thermostat is cool, the. Ivalve will be retarded i'n its, closing movement and-will not. have time to close more than part way before the thermostat will become heated and cause the closing mechanism to be lockedagainst' further closing movement, so that "it will not be necessary 8 for a person in lighting the burner to manually hold the valve open until the thermostat becomes heated. .As soon as'the thermostat has become heated and-locked the closing mechanism the valve is free to be set in any desired 'position,.accordin to the amount .of' flame desired and ,wil remain set in such position unless the-flame becomes extingulshed and allows the thermostat to cool. The accompanying drawings illustrate the invention, and referring thereto: f

Figure 1 is a side elevation of the burner with the spherical inclosing case in sectlon.

.Fig. 2 is a view similar to Fi 1, of the reverse side. Fig. 3 is a longitu inal section a through the body of thev burner andadj acent I portion ofthe thermostat. Fig.4 is a section on line w-w* of Fig. 1. Fig. 5,is a vertical section through a portion of the burner body, showing the relation of the lever, thermostat rod, and sprin plunger.

end of the body is a stem 4 on which is, screwed the tube 5 having ti 6. The body 1 and stems 2 and 4 are pre erably a single casting having a central fuel passage 7. Thebody 1 has a central valve seat in which is a tapered valve 8 having a. diametrical fuel passage 9 andv provided with a valve stem 10 on the outer end of which is a wing nut 11 for turning the valve.

As shown in Fig. 4 the body 1 is recessed to receive a disk 12 which is held in place and prevented from turning by two screws 13. The disk 12 has a sleeve 14 through which the valve stem 10 passes and a pm 15 on the valve stem limits the rotation of the valve to about half a revolution by striking either of two shoulders 10 on the sleeve 1 1 as shown in dotailin Fig. 2. The sleeve 14 has a notch 17 which is engaged by the inner end of a spiral spring 18 which is housed within a winding drum 19, the

outer .end of the spring being engaged with the winding drum. The winding drum'has two lugs 20 which are engaged by a pin 21 on the valve stem to windthe drum when the valve is turned, and permit about'a half a revolution of the valve independent of the drum to enable the valve to be set as desired after the closing mechanism has been locked due to the heating of the'thermostat as will be described.

The winding drum 19 has a gear 22 which meshes with a pinion 23 on a shaft 24 which extends through the body 1, and a gear 25 on the other end of shaft 24 meshes with a pinion 26 fixedon a hollow arbor 27 Loose on the arbor 27 is a gear 28 having a pawl 29'which is held by a spring 30, inengage ment with a ratchet 31 fixed on the arbor 27. A shaft 32 is screwed to the body 1 and arbor 27 is j ournaled thereon. The ear 28 meshes with a pinion 33 which is xed to an escapement wheel 34 journaled on a shaft 35 screwed to the body 1. A Wei hted escapement lever 36 is pivoted at 3 to the body 1 and has pallets 38 which coact with escapement wheel 34 to retard the movement of the train of gearing, when actuated by the spring 18'. A detent 39, pivoted at 40 to the body 1, is engaged-by a stud 41 on the end of a lever 42 pivoted to a screw 43 and thepivot 40 is located close to a stud 41" so':

that a very slight movement of stud 4'l yvi'll cause a considerable movement of the of the detent 39, sufficient to cause the detent' to engage or disengage the escape wheel 34:

- .The lever 42 is under spring tension pro duced by a plunger 44' pressed by a coil spring 45 confined by a screw plug 46. The

lever 42'is controlled'by' a thermostat comprising an outer brass tube 47 which' glisg f ixed at one end to the body" 1. Within th efitub upper hemis herical shell 49'and a lower Q admit fuel to the tip- 6 and as the valve is hemispherica shell 50 held in place 'by a removable collar '51. To light the burner valve 8 isturned' to turned, pin 21 turns drum 19 and winds the spring 18, the associatedtrain of gearing operating by movement of the drum.

Although the fuel may be immediately -ig-' nited the thermostat not being hot will overcome the power of the spring and plunger 44 to hold the detent 39 free from escape wheel34, and thus the train of earlng will commence to run: down but it W1 1 run down very slowly, being retarded by'the escape.

wheel 34. As the train of gearing thus runs down the valve slowly turns backward but its passage 9 is flared so that full escape of fuel is permitted for a short time, during which the thermostat becomes heated andthe tube 47 elongates and draws -u the-rod 48 thereby allowlng sprmgs 45 an plunger 44 to move the detent 39 into engagement with the escape. wheel 34 whereuponv the train of gearing is arrestedfrom further running down and the valve thus remains and free'to' be adjusted as desired by simply turningvalve stem 10 as the lugs 20 permit nearl a half revolutionof the valve without sufficient -to entirel the'passage 9 of t e'valve isflared scribed a full range of adjustment. from close t e valve and as maximum flow of fuel to complete stoppage offic'uel is possible. T

Should the flame thermostat atonce coolsywhich action is ac 'celerated by air holes 52,and as the tube contractslit, pushes down the'rod 48 which as 'deisturbing "in 21wh dis become extinguished the acts on. lever 42'to throwdetent 39 out of engagement with'escape wheel 34, whereupon 'the train of gearing 1mmediatelyruns= backward, turning-the valve, andshuts ofl' flowoffuel. v a

- What I claim is' I 2 A burner and valve therefor, spring op;

e'rated gearing for turning the valve, an 'escapement wheel and escapement lever for.

retarding the gearlng, a pivot'ed" detent.

adapted to engage the escapement wheel, a;

pivoted lever having a; stud engaging .the' I detent near the pivot of 'the-det'ent,-. a ther mostat comprising a telescopic tube and rod having different coefficients of expansion, the tube being secured to the burner. and'the' rod engaging the tube atone end and. its

other end bearing against said,lever,*a plum ger slidable .in said-bodyin line with said tubeQs'aid lever extending between saidplun gel" and rod, and a spring pressing plunger" toward said lever.

In testimony whereof, I have hereilnto set my hand at Los Angeles, California, this" 9th day of June 1908,

JQSEB W E Bm V In presence of- G. T. HAcnLEY, v I FRANK L, A. Gmr tm. 

